Mouthpiece for telephone-transmitters.



No. 665,25l. Patented Jan. I, mm.

W. S. MOORE. IOUTHPIECE F-OR TELEPHONE TRANSMITTERS.

A nmion and m 21. 1900.

(I0 Nodal.)

WITNESSES lNVENTOf? Unrrnn STATES ATENT OFFICE.

VVlNFIELD SCOTT MOORE, OF INDIANAPOLIS, INDIANA.

MOUTH PIECE FOR TELEPHONE-TRANSMETTERS.

SPECIFICATION forming part of Letters Patent No. 665,251, dated. January 1, 1901.

Application filed May 21, 1900. Serial No. 17,447. (No model.)

To all whom it may concern:

Be itknown that LWINFIELD Scor': Moons, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Mouthpieces for Telephone-Transmitters, of which the following is a specification.

The object of my said invention is to provide a mouthpiece to be used with telephonetransmitters, by means of which comparative privacy of conversation maybe secured when other persons are present, and also whereby echoing and reverberating effects may be precluded and at the same time the ordinary use of the transmitter be not interfered with.

Said invention will be first fully described, and the novel features thereof then pointed out in the claims.

Referring to the accompanying drawings,

which are made a part hereof, and on which similar reference characters indicate similar part-s, Figure 1 is a side elevation of the mouthpiece of a transmitter and a fragment of the casing carrying the same, myimproved attachment being connected to said mouthpiece, a second position being shown by dotted lines; Fig. 2, a front elevation of the same, and Fig. 3 a central vertical section on the dotted line 3 3 in Fig. 2.

My attachment is composed of a mouth piece proper, 1, which is of a shape to substantially inclose the mouth and nostrils of the speaker while using the same, a preferably flexible tube 2 of a convenient length, and a T-shaped hollow piece 8, extending across the ordinary mouthpiece of the transmitter, to one arm of which the flexible tube is connected, the other arm being open, as shown, while the stem of the T extends in at right angles with the arms to a point near the diaphragm of the transmitter. A bridgebar 4:, suit-ably connected to the l -shaped piece 3, forms the means of attaching my device to the transmitter. Said bridge-bar is comparatively narrow, so that the major portion of the transmitter-mouth is open and may be used in the ordinary manner, and when so used my attachment hangs idly and neither interferes with nor affects the operation in any manner. The bridge-bar 4: is

attached in any convenient manner, being shown with hooks h formed on one end and a clamp-screw 3 carried by the other, which operate in a manner which will be readily understood.

l have discovered by considerable experiment that when a tubularmouthpiece is used as an attachment to the regular mouthpiece of a transmitter, if it is so constructed as to convey the vibrations of the voice with full force against the diaphragm, much reverberation ensues, causing the instrument to operate badly and detracting much from its efficiency. One principal object of my invention has been to remedy this difficulty, and this I have done by carrying the transmitting tube straight across an ordinary transmitter-mouth, leaving its opposite end open, while the sound is conveyed to the diaphragm by a branch running at right angles with said tube this, in the construction shown being the stem of the T.

Another advantage arising from the open end is that foul air or breath is not confined in the tube, and the use of such an attachment is thus rendered much more pleasant and under better sanitary conditions.

My device, as shown, merely crosses and does not cover the ordinary transmitter. It is therefore entirely practicable to use a telephone provided with my attachment in the ordinary manner, the attachment meantime hanging idle and being without effect, which of course is impossible where the device fills or covers the ordinary transmitter-mouth.

Having thus fully described my said invention, what I claim'as new, and desire to secure by Letters Patent, is

1. The combination,with a telephone-transmitter, of an extension-mouthpiece attachment comprising a suitable mouthpiece proper, a tube extending therefrom, and a T secured to the ordinary transmitter-mouth, to one arm whereof the tube is connected, the other arm extending across the transmitter and being open, while the stem of the T extends at right angles in toward the transmitter-diaphragm,substantially as showniand described.

2. The combination,with a telephone-transmitter, of an extension-mouthpiece attachhand and seal, at Indianapolis, Indiana, this 19th day'of May, A. D. 1900.

WINFIELD SCOTT MOORE.

\Vitnesses:

CHESTER BRADFORD, JAMES A. WALSH. 

